I have a setup with QuickSynergy between two Ubuntu machines, set up like this:

Ubuntu 10.04.4 LTS (lucid) - synergy server, has mouse attached

Ubuntu 11.04 (natty) - synergy client (wants to use server mouse)

I've been using this setup some year(s) ago - and everything was working fine.

I come back to such a setup these days - and while the mouse pointer switches fine between screens, copy/paste on the client failed to work completely: that is, I select some text in any application (from scite to firefox) and copy (either via Ctrl-C; or via right-click/Copy from context menu) - I then try to paste (either via Ctrl-V; or via right-click/Copy from context menu), and absolutely nothing happens. Even more, after doing a copy action, right-clicking on the context menu shows "Paste" menu entry to be greyed out (disabled) - as if there is no data whatsoever on clipboard!

So, first I checked synergy versions on both machines, and it turns out they don't match (even though that was probably the case also previously in time, when I used the same setup, and everything was working). So I updated synergy in both machines by using Synergy : gogo [ppa:trebelnik-stefina/synergy] (I've used the maverick binaries for the lucid machine). Now both of them show the same version; e.g. for client:

The only thing that may have changed in respect to clipboard on these machines since last time I used a synergy connection successfully, is that I have installed the glipper clipboard applet on both machines. Could this have been the problem?

Once glipper is taken out on the server machine (note, killall glipper doesn't work on Lucid as it does on Natty - so on Lucid, I had to do ps axf | grep glipper, and then do kill 1234 on the process number), then copypasting works again - and here are some logs in that case:

Note that the client reports "lost clipboard 1 ownership" both when copy/paste works and when it doesn't; the difference I can see between the working and non-working case, is that in the working case, the client shows messages like "ICCCM fill clipboard 1" and "available targets: TIMESTAMP (373),...".

Well, other than that, I can't really say I understand these logs too well - but I hope they may help someone :),
Cheers!